.box{
    font-size: 30px;
}
.box span{
    display: inline-block;
    width: 80px;
    height: 30px;
    font-size: 20px;
    text-align: center;
    line-height: 30px;
    border: 1px solid #999;
    border-radius: 6px;
    margin: 5px;
}